HP 40gs hp 40gs_user's guide_English_E_HDPMSG40E07A.pdf - Page 128

hp40g+.book Page 2 Friday, December 9, 2005 1:03 AM Inference aplet's SYMB view keys The table below summarizes the options available in Symbolic view. Hypothesis Tests Z: 1 μ, the Z-Test on 1 mean Z: μ1 - μ2, the Z-Test on the difference of two means Z: 1 π, the Z-Test on 1 proportion Z: π1 - π2, the Z-Test on the difference in two proportions T: 1 μ, the T-Test on 1 mean T: μ1 - μ2, the TTest on the difference of two means Confidence Intervals Z-Int: 1 μ, the confidence interval for 1 mean, based on the Normal distribution Z-Int: μ1 - μ2, the confidence interval for the difference of two means, based on the Normal distribution Z-Int: 1 π, the confidence interval for 1 proportion, based on the Normal distribution Z-Int: π1 - π2, the confidence interval for the difference of two proportions, based on the Normal distribution T-Int: 1 μ, the confidence interval for 1 mean, based on the Student's t-distribution T-Int: μ1 - μ2, the confidence interval for the difference of two means, based on the Student's t-distribution If you choose one of the hypothesis tests, you can choose the alternative hypothesis to test against the null hypothesis. For each test, there are three possible choices for an alternative hypothesis based on a quantitative comparison of two quantities. The null hypothesis is always that the two quantities are equal.Thus, the alternative hypotheses cover the various cases for the two quantities being unequal: , and ≠. In this section, we will use the example data for the Z-Test on 1 mean to illustrate how the aplet works and what features the various views present. 11-2 Inference aplet